forked from go-fed/activity
/
generate_definitions.go
303 lines (290 loc) · 10.2 KB
/
generate_definitions.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
package gen
import (
"bytes"
"fmt"
"github.com/writeas/activity/tools/defs"
)
func generateDefinitions(t *defs.Type, m map[*defs.PropertyType]*intermedDef) (fd []*defs.FunctionDef, sd []*defs.StructDef, x []*defs.InterfaceDef, imports map[string]bool) {
imports = make(map[string]bool)
this := &defs.StructDef{
Typename: t.Name,
Comment: t.Notes,
M: []*defs.StructMember{{"unknown_", "map[string]interface{}", "An unknown value."}},
}
sd = append(sd, this)
thisInterface := &defs.InterfaceDef{
Typename: InterfaceName(t),
Comment: fmt.Sprintf("%s is an interface for accepting types that extend from '%s'.", InterfaceName(t), t.Name),
O: []string{"Serializer", "Deserializer"},
}
x = append(x, thisInterface)
var serializeFragments []string
var deserializeFragments []string
for _, p := range t.GetProperties() {
pf, pd, s, d := generatePropertyDefinitions(p, this, thisInterface, m)
serializeFragments = append(serializeFragments, s)
deserializeFragments = append(deserializeFragments, d)
fd = append(fd, pf...)
sd = append(sd, pd...)
for _, r := range p.Range {
if r.V != nil {
for _, i := range r.V.Imports {
imports[i] = true
}
}
}
}
generateWithoutProperties(t, this, thisInterface, m)
generateAddUnknownFunction(t, this)
generateHasUnknownFunction(t, this)
generateRemoveUnknownFunction(t, this)
generateSerializeFunction(t, this, serializeFragments)
generateDeserializeFunction(t, this, deserializeFragments)
return
}
func Name(r defs.RangeReference) string {
if r.T != nil {
return r.T.Name
} else if r.V != nil {
return r.V.Name
} else if r.Any {
return "any"
} else {
panic("RangeReference must have exactly one member set")
}
}
func Type(r defs.RangeReference) string {
if r.T != nil {
return InterfaceName(r.T)
} else if r.V != nil {
return r.V.DefinitionType
} else if r.Any {
return "interface{}"
} else {
panic("RangeReference must have exactly one member set")
}
}
func Deserialize(r defs.RangeReference, mapName, field string, slice bool) string {
if r.T != nil {
var parseCode bytes.Buffer
parseCode.WriteString(fmt.Sprintf("tmp := &%s{}\n", r.T.Name))
parseCode.WriteString("err = tmp.Deserialize(v)\n")
parseCode.WriteString("if err != nil {\nreturn err\n}\n")
var b bytes.Buffer
b.WriteString("// Begin generation by RangeReference.Deserialize for Type\n")
deserializeCode(&b, parseCode.String(), mapName, "map[string]interface{}", field, slice, false)
b.WriteString("// End generation by RangeReference.Deserialize for Type\n")
return b.String()
} else if r.V != nil {
var b bytes.Buffer
b.WriteString("// Begin generation by RangeReference.Deserialize for Value\n")
deserializeCode(&b, fmt.Sprintf("tmp, err := %s(v)\n", r.V.DeserializeFn.Name), mapName, "interface{}", field, slice, false)
b.WriteString("// End generation by RangeReference.Deserialize for Value\n")
return b.String()
} else {
panic("Bad call to Deserialize for Any")
}
}
func Serialize(r defs.RangeReference, mapName, field string, slice bool) string {
if r.T != nil {
var sCode bytes.Buffer
sCode.WriteString("tmp, err := v.Serialize()\n")
sCode.WriteString("if err != nil {\nreturn m, err\n}\n")
var b bytes.Buffer
b.WriteString("// Begin generation by RangeReference.Serialize for Type\n")
serializeCode(&b, sCode.String(), mapName, field, slice)
b.WriteString("// End generation by RangeReference.Serialize for Type\n")
return b.String()
} else if r.V != nil {
deref := "*"
if slice || isIRIType(Type(r)) {
deref = ""
}
var b bytes.Buffer
b.WriteString("// Begin generation by RangeReference.Serialize for Value\n")
serializeCode(&b, fmt.Sprintf("tmp := %s(%sv)\n", r.V.SerializeFn.Name, deref), mapName, field, slice)
b.WriteString("// End generation by RangeReference.Serialize for Value\n")
return b.String()
} else {
panic("Bad call to Serialize for Any")
}
}
func generateRemoveUnknownFunction(t *defs.Type, this *defs.StructDef) {
m := &defs.MemberFunctionDef{
Name: "RemoveUnknown",
Comment: "RemoveUnknown removes a raw extension from this object with the specified key",
P: this,
Args: []*defs.FunctionVarDef{{"k", "string"}},
Return: []*defs.FunctionVarDef{{"this", "*" + t.Name}},
Body: func() string {
var b bytes.Buffer
b.WriteString("delete(t.unknown_, k)\n")
b.WriteString("return t\n")
return b.String()
},
}
this.F = append(this.F, m)
}
func generateHasUnknownFunction(t *defs.Type, this *defs.StructDef) {
m := &defs.MemberFunctionDef{
Name: "HasUnknown",
Comment: "HasUnknown returns true if there is an unknown object with the specified key",
P: this,
Args: []*defs.FunctionVarDef{{"k", "string"}},
Return: []*defs.FunctionVarDef{{"b", "bool"}},
Body: func() string {
var b bytes.Buffer
b.WriteString("if t.unknown_ == nil {\n")
b.WriteString("return false")
b.WriteString("}\n")
b.WriteString("_, ok := t.unknown_[k]\n")
b.WriteString("return ok\n")
return b.String()
},
}
this.F = append(this.F, m)
}
func generateAddUnknownFunction(t *defs.Type, this *defs.StructDef) {
m := &defs.MemberFunctionDef{
Name: "AddUnknown",
Comment: "AddUnknown adds a raw extension to this object with the specified key",
P: this,
Args: []*defs.FunctionVarDef{{"k", "string"}, {"i", "interface{}"}},
Return: []*defs.FunctionVarDef{{"this", "*" + t.Name}},
Body: func() string {
var b bytes.Buffer
b.WriteString("if t.unknown_ == nil {\n")
b.WriteString("t.unknown_ = make(map[string]interface{})\n")
b.WriteString("}\n")
b.WriteString("t.unknown_[k] = i\n")
b.WriteString("return t\n")
return b.String()
},
}
this.F = append(this.F, m)
}
func generateDeserializeFunction(t *defs.Type, this *defs.StructDef, fragments []string) {
d := &defs.MemberFunctionDef{
Name: "Deserialize",
Comment: "Deserialize populates this object from a map[string]interface{}",
P: this,
Args: []*defs.FunctionVarDef{{"m", "map[string]interface{}"}},
Return: []*defs.FunctionVarDef{{"err", "error"}},
Body: func() string {
var b bytes.Buffer
b.WriteString("for k, v := range m {\n")
b.WriteString("handled := false\n")
for _, s := range fragments {
b.WriteString("if !handled {\n")
b.WriteString(s)
b.WriteString("}\n")
}
b.WriteString("if !handled && k != \"@context\"{\n")
b.WriteString("if t.unknown_ == nil {\n")
b.WriteString("t.unknown_ = make(map[string]interface{})\n")
b.WriteString("}\n")
b.WriteString(fmt.Sprintf("t.unknown_[k] = %s(v)\n", unknownValueDeserializeFnName))
b.WriteString("}\n")
b.WriteString("}\n")
b.WriteString("return\n")
return b.String()
},
}
this.F = append(this.F, d)
}
func generateSerializeFunction(t *defs.Type, this *defs.StructDef, fragments []string) {
d := &defs.MemberFunctionDef{
Name: "Serialize",
Comment: fmt.Sprintf("Serialize turns this object into a map[string]interface{}. Note that the \"type\" property will automatically be populated with \"%s\" if not manually set by the caller", t.Name),
P: this,
Return: []*defs.FunctionVarDef{{"m", "map[string]interface{}"}, {"err", "error"}},
Body: func() string {
var b bytes.Buffer
b.WriteString("m = make(map[string]interface{})\n")
b.WriteString("for k, v := range t.unknown_ {\n")
b.WriteString(fmt.Sprintf("m[k] = %s(v)\n", unknownValueSerializeFnName))
b.WriteString("}\n")
b.WriteString("var typeAlreadySet bool\n")
b.WriteString(fmt.Sprintf("for _, k := range t.%s {\n", cleanName(typePropertyName)))
b.WriteString("if ks, ok := k.(string); ok {\n")
b.WriteString(fmt.Sprintf("if ks == \"%s\" {\n", t.Name))
b.WriteString("typeAlreadySet = true\n")
b.WriteString("break\n")
b.WriteString("}\n")
b.WriteString("}\n")
b.WriteString("}\n")
b.WriteString("if !typeAlreadySet {\n")
b.WriteString(fmt.Sprintf("t.%s = append(t.%s, \"%s\")\n", cleanName(typePropertyName), cleanName(typePropertyName), t.Name))
b.WriteString("}\n")
for _, s := range fragments {
b.WriteString(s)
}
b.WriteString("return\n")
return b.String()
},
}
this.F = append(this.F, d)
}
func generateWithoutProperties(d *defs.Type, this *defs.StructDef, it *defs.InterfaceDef, m map[*defs.PropertyType]*intermedDef) {
hasNamed := make(map[string]bool, 0)
for _, p := range d.GetProperties() {
hasNamed[p.Name] = true
}
for _, t := range d.WithoutProperties {
if hasNamed[t.Name] {
// No need to stub -- already has a replacement.
continue
}
clonedThis := &defs.StructDef{
Typename: this.Typename,
Comment: this.Comment,
}
_, _, _, _ = generatePropertyDefinitions(t, clonedThis, it, m)
for _, f := range clonedThis.F {
if len(f.Return) > 1 {
panic("generateWithoutProperties can only handle replacing functions with zero or one return types")
}
f.P = this
f.Comment = fmt.Sprintf("%s is NOT a valid property for this type; calling its associated methods will always yield an empty-equivalent value such as false, nil, or empty string. This includes instances where it should return itself. This ugliness is a symptom of the fundamental design of the ActivityStream vocabulary as instead of 'W-is-a-X' relationships it contains the notion of 'W-is-a-X-except-for-Y'.", f.Name)
if len(f.Return) > 0 {
returnType := f.Return[0].Type
f.Body = func() string {
var b bytes.Buffer
if returnType == "url.URL" {
b.WriteString("return url.URL{}\n")
} else if isSlice(returnType) || isPtrType(returnType) {
b.WriteString("return nil\n")
} else if returnType == "bool" {
b.WriteString("return false\n")
} else if returnType == "int" {
b.WriteString("return 0\n")
} else if returnType == "interface{}" {
b.WriteString("return nil\n")
} else {
found := false
for _, v := range t.Range {
if v.V == nil {
continue
}
if returnType == deref(Type(v)) {
found = true
b.WriteString(fmt.Sprintf("return %s\n", v.V.Zero))
}
}
if !found {
b.WriteString("return nil\n")
}
}
return b.String()
}
this.F = append(this.F, f)
} else {
f.Body = func() string { return "\n" }
this.F = append(this.F, f)
}
}
}
}
func InterfaceName(t *defs.Type) string {
return fmt.Sprintf("%sType", t.Name)
}